How to make an ice lake with the Principled Shader?
Final:



Node setup &amp; overview:

First of all you want to have Roughness value to be pretty low. I've used procedural Roughness map, but without it value around 0.05 will give good results. This is based on the ice you want to make.

Secondly, don't forget that clear ice is transparent, you'll need to add Transmission (like for glass). It don't need to be fully 1.0. Also ice has IOR value 1.309, I've forgot to change it.